<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
            .toggler { width: 500px; height: 200px; position: relative; }
            #button { padding: .5em 1em; text-decoration: none; }
            #effect {position: relative;  width: 240px;  padding: 1em; letter-spacing: 0; font-size: 1.2em; border: 1px solid #000; background: #eee; color: #333; }
            .newClass { text-indent: 40px; letter-spacing: .4em; width: 410px; height: 100px; padding: 30px; margin: 10px; font-size: 1.6em; }
    </style>
    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
    <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
    <script>
            $(document).ready(function(){
                $('#btn').click(function(){
                    var request=$.ajax({
                        url:"data.html",
                        method:"POST",
                        data:{id:1},
                        dataType:"html"
                    });
                    request.done(function(msg){
                        $("#content").html(msg);
                    });
                    request.fail(function(jqXHR,textStatus){
                        alert("Request failed:"+textStatus);
                    });
                });
            });
            $(function(){
                $("#button").on("click",function(){
                    $("#effect").toggleClass("newClass",1000)
                });
            });
    </script>
</head>
<body>
    <button type="button" id="btn">点击发起ajax请求</button>
    <div id="content">

    </div>
    <div class="toggler">
        <div id="effect" class="newClass ui-corner-all">
            lijiajiechishi,xihuanyaqiang.askjhfka
            dhsabkfjaskjf askjbfjasbfjklabfkjbkjsafbkjsab
        </div>
    </div>
    <button id="button" class="ui-state-default ui-corner-all">jiajiechishi</button>
</body>
</html>